Graphic processing method for drawing an area defined by clippin

Details Graphic processing method for drawing an area defined by clippin Graphic processing method for drawing an area defined by clippin

1990-03-12

1994-02-15

Herndon, Heather R.

395133, 395135, G06F 1562

Patent

active

052874400

ABSTRACT:
A graphic processing device is composed of a main storage device, a drawing control device and a drawing device. The main storage device stores data relative to the coordinates of plural graphics. The drawing control device reads out the data relative to the coordinates of the plural graphics stored in the main storage device, scans the coordinate data to calculate the coordinates of intersecting points of a scanning line and the plural graphics for each position of the scanning line. The drawing control device also determines an overlapping area (AND area) or a common area (OR area) of the plural graphics on the basis of the coordinates of the intersecting points of the plural graphics and the scanning line. The drawing device draws the overlapping area (AND area) and the common area (OR area) of the plural graphics as a graphic.

REFERENCES:
patent: 4622545 (1986-11-01), Atkinson
patent: 4984183 (1991-01-01), Ohuchi

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